Freezing apparatus



Dec. 7 1926.

W. W. PARKER FREEZING APPARATUS Filed Jan. 28, 1926 A w 2 w a r t w w 7 //.m m n u 0 n H //J n 1 H J N HHH A /7 1 m v 6 N /,y 1l|||| ul l lfln I 1 1 l: 8 M c w Attorney Palented Dec. 7, 1926.

WILLIAM W. PARKER, OF RALEIGH, NORTH CAROLINA.

FREEZING APPARATUS.

Application filed January 28, 1926.

My present invention pertains to apparatus for freezing cream and other substance; and it contemplates the provision of a simple, highly efficient and inexpensive freezing apparatus, as hereinafter described and definitely claimed.

In the accompanying drawing, forming part of this specification The figure is a view partly in section and partly in elevation, and illustrative of the best practical embodiment of my invention of which 1 am cognizant.

Among other elements my novel freezing apparatus comprises a casing body 1, of any appropriate character, open at its upper end, and chambered at its lower end as designated by 2, and provided with a closure plate 3 for the chamber 2 and also provided with a drain 4, the latter being designed to discharge into a receptacle placed below the casing body 1 or to be connected with a conduit, not shown, that may lead to any desired point of discharge.

Located in the chamber 2 is'a worm gear 5 fixed to a shaft 6, stepped at 7 in a bearing carried by the closure plate 3 and extending through and adapted to turn about its axis in a bearing in the top wall of the chamber 2 and terminating at its upper end in an angular portion 8. Also located in the chamber 2 is a worm 9 on the armature shaft 10 of an electric motor 11. the latter being located exteriorly of the casing body and alongside the same.

At 12 is a can for receiving substance to be frozen. The said can in the operation of my novel apparatus is rotated about its axis, and it will be noted that the upper end of the can 12 is open, and that the can is capped by a removable cover 13 having a collar 14 journaled in the removable cover 15 of the casing. Surrounding the upper portion of the can 12 and removably arranged on supporting lugs 15 in the casing body 1 is an annulus 16. The said annulus 16 is made removable in order that when necessary access may be gained to the space within the casing body 1 and between the side wall or walls of said casing body and the can 12.

At its lower end the casing body 1 receives in the upper wall of the chamber 2 a bearing 17. The said bearing 17 surrounds the shaft 6, and is provided at its lower end with a flange 18 adapted to hold the worm gear 5 with attached shaft 6 against upward movement. At its lower end the can Serial No. 84,359.

12 is provided with a portion 19 of angular form in horizontal section which receives the angular end 8 of the shaft 6 so as to assure turning of the can 12 about its axis with the shaft 6. The exterior of the portion 19 of the can 12 is circular in horizontal section and is disposed in a shallow socket 20 at the lower end of a stationary or non-rotatable dasher 21, the said dasher 21 being of any construction compatible with the purpose of my invention, and being provided at its upper end with an angular portion 22 keyed in the casing cover 15 whereby the dasher 21 is held against rotation irrespective of the powerful turning of the can 12 about the dasher. Manifestly following removal of the cover 15 of the casing, the cap 13 of the can may be readily lifted from the can and from the dasher to afford convenient access to the substance in the can.

Coiled about the can 12 is a refrigerant conduit 30, the inlet terminal of which is designated by 31 and the outlet terminal by 32. In said conduit is located a valve 33 having a handle 34, and also in the conduit is located an expansion valve 35, said expansion valve 35 being of conventional or other appropriate construction. The valve 33 which is of cut 011' type and the expansion valve 35 are preferably arranged as illus trated relative to the casing body 1. I would also have it understood that I employ at 40 an automatic motor switch a member 41 of which is opposed to the handle 34 of the cut off valve 33. Between the switch 40 and the motor 11 is a lead 50, and also connected to the switch 40 is a lead adapted to be connected with any appropriate source of electric energy.

In the practical useh of my novel apparatus, appropriate mixture is poured in the can 12, and the dasher 21 is placed in posi tion, after which the cover 13 is placed in closed position, and cover 15 is also placed in closed position so as to receive and support the collar 14 on the can cap and prevent lateral deflection of the can. It will also be noted that on the placing of the cover 15 in the position illustrated, the cover will cooperate with the square upper end of the dasher 21 to strongly hold said dasher against rotation. The motor switch 40 is now closed through the medium of the handle 41, and the said movement of the handle 41 by acting against the handle 34 of the cut off valve 33 turns refrigerant into the expansion valve 35 and the conduit 30 about the can 12. The maintenance of the switch 40 in closed state will be attended by operation of the motor 11, and from the said motor 11 the can 12 will be powerfully turned about its axis. Incident to this operation, the contents of the can 12 will be agitated, and as freezing progresses, due to the action of the expanding refrigerant in the conduit 30. and as the contents of the can 12 become hard and stiff, the load on the motor 11 will be increased. The said increase of load on the motor 11 causes more current to flow through the automatic C11- cuit breaking switch 40 until at a predetermined time, the handle 41 flies open and brings about stoppage of the motor 11, and in said movement the handle 41 acts against the handle 34 of the valve 33 and thereby cuts off the supply of refrigerant to the conduit 30, or if preferred, the handles 41 and 34 may be so relatively arranged that the said automatic movement of the handle 41 may take place without acting against the handle 34 to close the valve 33, so that after operation of the motor 11 refrigerant may still be supplied to the conduit 30 to maintain the contents of the can 12 in a frozen state.

Of course, when the can 12 is empty, the valve handle 34 is manipulated manually to cut off the supply of refrigerant from the conduit 30.

Manifestly the annulus supported in the casing body 1 and about the upper portion of the can 12 will operate to prevent canting of the can 12 against the convolutions of the conduit 80, and will also 0 erate to prevent the fall of substance to e frozen into the space between the wall of the casing body 1 and the can 12.

Notwithstanding the practical advantages ascribed to my novel freezing apparatus, it will be noted that the apparatus is simple and inexpensive in construction and when employed in a household may be operated as an adjunct to refrigerators in which a refrigerant of expanding character is employed.

I have specifically described the preferred embodiment of my invention in order to impart a full, clear and exact understanding of the said embodiment. I do not desire, however, to be understood as confining myself to the structure illustrated and described in detail, my invention being defined by my appended claims within the scope of which structural changes and changes in arrangement may be made without departure from my invention.

Having described my invention, what I claim and desire to secure by Letters-Patent, 1S:-

1. A freezing apparatus comprising a casing body having a chamber in its lower portion,

a shaft extending upwardly from said chamber and having a portion of angular cross section above the chamber, a driving connection complementary to the shaft, arranged in said chamber, a removable cover for the caving body, said cover having a socket of angular cross section, a rotatable can disposed in the casing body and having an upwardly extending, central bottomiportion interiorly of angular form in horizontal section and exteriorly of circular form in horizontal section and receiving the angular portion of said shaft for the rotation of said can by said shaft, a cap removably arranged on the can and having a collar journaled in the under side of the casing cover, and a non-rotatable dasher in the can, having an upper portion of angular cross section arranged in and held against rotation by the said socket of the casing cover and also having a lower portion of circular form in cross section. surrounding and superposed upon the said exteriorly circular upwardly extending bottom portion of the can.

2. A freezing apparatus comprising a casmg body having a chamber in its lower portion, a shaft extending upwardly from said chamber and having a portion of angular cross section above the chamber, a driving connection complementary to the shaft, arranged in said chamber, a removable cover for the casing body, said cover having a socket of angular cross section, a rotatable can disposed in the casing body and having an upwardly extending, central bottom portion interiorly of angular form in horizontal section and exteriorly of circular form in horizontal section and receiving the angular portion of said shaft for the rotation of said can by said shaft, a cap removably arranged on the can and having a collar journaled in the under side of the casing cover, and a non-rotatable dasher in the can, having an upper portion of angular cross section arranged in and held against rotation by the said socket of the casing cover and also having a lower portion of circular form in cross section surrounding and superposed upon the said exteriorly circular upwardly extending bottom portion of the can; the said driving connection in the chamber of the casing body comprising a worm gear fixed with respect to the said shaft, a worm meshed with said worm gear, and a shaft to which the worm is fixed journaled in the casing body and extending to one side thereof.

3. A freezing apparatus comprising a casing body having a chamber in its lower portion, a shaft extending upwardly from said chamber and having a portion of angular form in horizontal section above the chamber. a drivingconnection complementary to the shaft, arranged in said chamber,

a rotatable can disposed in the casing body and having an upwardly extending bottom portion interiorly of angular form in horizontal section and exteriorly of circular form in horizontal section, said bottom portion receiving the angular portion of said shaft, and a non-rotatable dasher in the can and having a portion interiorly of circular form in horizontal section surrounding and superposed upon. the said exterior circular upwardly extending portion at the bottom of the can.

4. In a freezing apparatus, a casing body, a rotary can therein, a refrigerant conduit disposed in the casing and about the can, an electric motor, a driving connection intermediate of said motor and the can for turning the latter by the former, an expansion valve intermediate of a source of refrig- I erant supply and the said conduit about the can, a valve arranged in a conduit between said expansion valve and a source of refrigerant supply, and an automatic circuit breaking switch electrically connected with the motor and adapted to be electrically con-.

nected with a source of electric energy and having a movable member adapted when moved to put the motor in operation to open the refrigerant valve.

5. In a freezing apparatus, and in combination, a casing, a can therein, a dasher in said can, one of the two latter elements being rotary, a refri erant conduit disposed in the casing and a out the can, an electric motor, a driving connection intermediate of said motor, and the said rotatable element for turning the latter by the former, an expansion valve intermediate of the source of refrigerant supply and the said conduit about the can, a valve arranged in a conduit between said expansion valve and a source of refrigerant supply, and an automatic circuit breaker switch electrically connected with the motor and adapted to be electrically connected with a source of electric energy and having a movable member adapted when moved to out the motor in operation to open the refrigerant valve.

In testimony whereof I aliix my signature.

WILLIAM W. PARKER. 

